William hutchison



(No Model.)

- W. HUTOHISON.

HOLLOW METAL RING! No. 249,838. Patented Nov. 22,1881.

% W I z 0 M. 01

UNITE STATES PATENT QFFICE.

WILLIAM HUIOI-IISON, OF NEWARK, NEW JERSEY.

HOLLOW M ETAL RING.

SPECIFICATION forming part of Letters Patent No. 249,838, dated November 22, 1881.

- Application filed April 1, 1881. No model.) i

To all whom it may concern Be it known that I,WILL1AM HU'IOHISON, of Newark, in the county of Essex and State of New Jersey, have invented a certain new and 5 useful Improvement in Hollow Metal Rings; and I do hereby declare the following to be a full, clear, and exact description of the invention,such as willenable others skilledin the art to which itappertainsto make and use the same,

reference being bad to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of this invention is to facilitate and thereby reduce the cost of constructing hollow rings.

It consists in a hollow metal ring castin one piece, substantially as will be hereinafter fully described, illustrated, and finally embodied in the claims.

Referring to the accompanying drawings, in which similar letters of reference indicate like parts in each of the several figures, Figure l is a. plan view of a core used in my peculiar method of casting hollow rings; Fig. 2, a section of the same, taken through line 00; Fig. 3,

a sectional view of a partly-finished ring, illustrating the condition of the same after being cast; and Fig. 4 is a view showing a modification in construction.

In carrying out my invention, I first construct a pattern having a body (corresponding in size and shape to the body a upon the core) and rim 1), the diameter of said rim being slightlylarger than the diameter of the desired 5 ring, and conforming to said ring in general outline. This said pattern is laid,in the usual manner for making castings, into the sand, and when removed leaves its impress therein, as will be understood. 1 then laya core formed of sand or other suitable material, having a body, a, conforming in size and shape to the body of the before-mentioned pattern, and a rim,b,sim1larto the rim upon the pattern, but

the sand. It will be evident that there will 5 remain a chamber around said rim I), which, when filled with metal,will form a hollow ring having an opening, c,therein, as shown in Fig.

3. The opening 0 may, after the above-mentioned process is finished, be closed by placing the ring in suitable dies and pressing the sides together, this, however, being done subsequent to extracting the sand which formed the core from said hollow ring. When the opening ois closed the edges may be soldered, welded, or otherwise secured together to give strength to the ring.

It is evident that instead of having the portion aof the'patteru and core in the center thercof,'as in Figs. 1 and 2, it may lie on the outside, as shown in Fig. 4, in which case the opening 0 will be formed in the peripheryof the ring.

By this method of casting the rings great lightness may be obtained where lightness is desirable, as in terrets, martingale-rings, and other rings used in saddlery-hardware.

My method of casting hollow rings also prevents blowing when pouring the metal into the mold, allowing a full and sufficient vent for the air in said process.

Having thus described my invention, what I claim, and wish to secure by Letters Patent, 1S

1. A hollow cast-metal ring formed in one piece, substantially as and for the purpose set forth.

2. A hollow cast-metal ring formed in one piece, having an opening, 0, adapted to be closed, substantially as and for the purpose set forth and shown.

In testimony that I claim the foregoing I have hereunto set my hand this 15th day of March, 1881.

WILLIAM HUTGHISON.

Witnesses:

OLIVER DRAKE,

CHARLES H. PELL.

of a smaller diameter, into the impression in 

